Question

The heat transferred from a system to its surroundings (or vice versa) when a chemical reaction is run under conditions of constant pressure is equal to:

• A. The change in the free energy of the system (∆C)
• B. The change in the enthalpy of the system (∆H)
• C. The change in the energy of the system (∆E)
• D. The change in the entropy of the system (∆S)

Answer 1

The correct option is B

The change in the enthalpy of the system (∆H)

Enthalpy change is heat absorbed or evolved at constant pressure.